Max Refrigerant Piping Length; Additional Refrigerant Charge - Mitsubishi Electric MXZ-3E54VA-E1 Service Manual

MXZ-3E68VA
R.V. coil
Refrigerant flow in cooling
OFF
ON Refrigerant flow in heating
Indoor unit
C
Indoor unit
B
Indoor unit
A
Indoor unit
A
Indoor unit
B
Indoor unit
C

MAX REFRIGERANT PIPING LENGTH

Piping length each indoor unit (a, b, c)
Total piping length (a+b+c)
Bending point for each unit
Total bending point
It is irrelevant which unit is higher.

ADDITIONAL REFRIGERANT CHARGE

Outdoor unit
Refrigerant piping length (one way, 3 unit total)
precharged
40 m
(g)
2,700
Calculation : Xg = 20 g/m x (Refrigerant piping length (m) - 40)
WHEN CONNECTING TO MFZ-KJ SERIES INDOOR UNIT
MXZ-3E68VA
No. of
MFZ-KJ
indoor units
None
1 unit 100 g additional charge (2,800 g)
2 units 200 g additional charge (2,900 g)
3 units 300 g additional charge (3,000 g)
Refrigerant pipe diameter is different according to indoor unit to be
connected. When using extension pipes, refer to the right table.
When diameter of refrigerant pipe is different from that of outdoor
unit union, use optional Different-diameter pipe.
For further information on Different-diameter pipe, refer to "PARTS
CATALOG".
OBH723D
High-pressure switch
Stop valve with
service port
Muffler
Capillary tube
Strainer LEV A
#100
Capillary tube
Strainer
LEV B
#100
Capillary tube
LEV C
Strainer
#100
25 m
60 m
25
60
50 m
0 200
Refrigerant piping length (L)
~ 40 m
Charge-less (2,700 g)
Compressor
Discharge
temperature
thermistor RT62
Capillary tube
Oil separator
4-way valve
Strainer
Stop valve
#100
Power
receiver
Indoor
units
60 m
400
~ 60 m
(L-40) x 20 g/m
100 g + (L-40) x 20 g/m
200 g + (L-40) x 20 g/m
300 g + (L-40) x 20 g/m
45
Outdoor heat
exchanger
temperature
thermistor
RT68
Strainer
LEV E
#100
Distributor
a
b
Outdoor
unit
c
Maximum amount of
refrigerant
3,100 g
3,200 g
3,300 g
3,400 g
Outdoor unit union diameter
For
Liquid
Indoor unit A
Gas
Liquid
Indoor unit B
Gas
Liquid
Indoor unit C
Gas
UNIT: mm
FAN-OUT
Ambient
temperature
thermistor
RT65
Defrost
thermistor
RT61
Capillary tube
Max.
Height
difference
15 m
15 m
10 m
UNIT: mm (inch)
6.35(1/4)
9.52(3/8)
6.35(1/4)
9.52(3/8)
6.35(1/4)
9.52(3/8)